Object.prototype.name = "mashaodong";
let a = new Object();
Object.prototype.age = 18;
let b = new Object();

Object.prototype.getUserInfo = function () {
  console.log(`${this.name}今年${this.age}岁`);
};

a.name = "guocuicui ";

console.log(a.name, a.age);
console.log(b.name, b.age);
b.getUserInfo();
console.log(a.__proto__);
console.log(Object.prototype);
